public static void M1<T>(Func<T> f, Action<T> a)
        {
            var x = f();
            a(x);
        }

M1(() => new { a = 1, b = "qwe" }, v => Console.WriteLine(v));

static readonly Expression<Func<MyClass, int>> MyExpression = o => o.Value;

class Class1
{
    public class Data F1()
    {
        return new { A = 10, B = 20 };
    }

    public void F2(Data data)
    {
        var a = data.A;
        var b = data.B;
    }
}

 static (int Number, string Name) Get()
        {
            return (2, "asd");
        }

   static IEnumerable<(int Number, string Name, decimal Price)>M2()
        {
            var data = Enumerable.Range(1, 10).Select(i => (i, "Name" + i, Convert.ToDecimal(i) * 100));
            return data;
        }

 foreach(var d in M2())
            {
                Console.WriteLine(d);
            }

    public string sql_ru((int a, int b, int c) arg)
        {
          switch(arg)
            {
                case (4, 5, 6):
                    break;
            }
            return null;
        }